I'm suddenly finding an unexpected level of comfort praying the Daily Office completely from my iPad.
It requires two apps to make it a fluid and satisfying experience: iBCP and Lectionary. And it would not be possible without the multi-tasking feature on the iPad, accessed by double-clicking the Home button.
It requires knowing a handful of page numbers in the Prayer Book to get started. But in the spot where the Collect of the Day comes, it only takes clicking on two hyperlinks to find it, and then you can use the Back button to return to MP/EP.
The mechanics of doing this are scarcely more invasive (and may be even less so) than dealing with a Prayer Book (or office book) and lectionary (or Bible). It allows some actual praying to get done.